MSVC requires redeclarations to repeat noexcept

llvm-svn: 221177
diff --git a/llvm/tools/llvm-readobj/Error.cpp b/llvm/tools/llvm-readobj/Error.cpp
index a078f5c..7e6f780 100644
--- a/llvm/tools/llvm-readobj/Error.cpp
+++ b/llvm/tools/llvm-readobj/Error.cpp
@@ -24,7 +24,7 @@
 };
 } // namespace
 
-const char *_readobj_error_category::name() const {
+const char *_readobj_error_category::name() const LLVM_NOEXCEPT {
   return "llvm.readobj";
 }